This past week, another doctor made the mistake of appearing here. It seems trouble follows him everywhere, as puzzle creator Craig Kasper reveals here.

PDF

or solve online (using our beta test of Penpa-Edit tools)

Theme: Dalek Invasion

Rules: Standard Sudoku rules except that instead of the numbers 1-9 this puzzle uses the letters in “END MATRIX”. Also, clues in the grid represent typical “Seek and Spell/Kanaore” clues; specifically, it must be possible to read each of the words/phrases listed below the grid by starting at the indicated number, moving one cell in the direction indicated by the arrow, and then continuing to move one cell at a time up, down, left, or right to complete the word/phrase. No cell may be used more than once in a single path, but the same cell can appear in the paths of different words/phrases.

Answer String: Enter the 2nd row from left to right, followed by a comma, followed by the 6th row from left to right. Use all capital letters.

Solution: PDF

A few weeks ago Giovanni P. asked what our visitors might think about “other puzzles.” His question was specific to word puzzles, but this week I put the question to the test when I posted our first “Puzzle Hunt” puzzle. The Monday puzzle was not announced as such. Instead it was meant to just look like an April Fools joke. But it already has the most FAVEs of any puzzle on the site. So what are “Puzzle Hunt” puzzles and what was really going on with that word search?

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PDF

or solve online (using our beta test of Penpa-Edit tools; use tab to alternate between a line drawing mode and a shading mode.)

Theme: Grandmasters

Rules: Standard Word Search rules.

Answer String: Enter the final message, related to what you are getting today, revealed by solving the puzzle. Enter the answer in all capital letters, with no spaces or punctuation.

Time Standards (highlight to view): Grandmaster = 8:30, Master = 11:30, Expert = 23:00

Solution: PDF

In addition to FoxFireX’s incredible sudoku gift that he made for someone’s birthday (some puzzles are meant to keep more private), we got three other submissions for our first Hidden Contest. We’re posting them here in increasing order of difficulty.

First up is an “Anti-Symmetry” Nurikabe from Giovanni P. where every clue that is odd/even has an even/odd clue in the corresponding symmetric place. Standard Nurikabe rules are all you need for this challenge.

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Next up is a real RARITY for this website, a Shakashaka. For the general rules, we’ll direct you to Nikoli.com where the puzzle originated. Here, Bryce Herdt has made a cipher version of the puzzle. The letters AIRTY each stand for a different number from 0 – 4 which the solver must determine.

Solution image

Finally, the hardest of the bunch, is an intriguing variation called “Sudoku Slitherlink” by its designer Scott Handelman. In addition to standard Slitherlink rules, a different number from 0-3 must go into each green cell. No number in a green cell can repeat in that row or column. As Scott warns, this is one of the hardest puzzles he’s constructed and, from his original post, he’s “still kinda shocked that the middle just kinda ‘works'”.

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All of these puzzles are grouped in this single PDF.

If you enjoy these puzzles, please comment here and say so, thanking each of the authors. As contest entries, these didn’t go through editorial review (except making sure there was a single answer), but we found them all quite interesting and worthy of being some of the first puzzles from other authors to appear on this web-site. We’re considering keeping Sunday open for “guest” submissions each week from new puzzle authors. And once we get through a stack of puzzle submissions for The Art of Puzzles, more authors will be appearing throughout the week too.

I wanted to start this week by reintroducing this site for readers who may be visiting for the first time after reading a TIME magazine feature on the US Puzzle Team this week. Grandmaster Puzzles is the home to a range of logic puzzle types that may be familiar to you or completely new. I recommended that you start with the familiar, like Sudoku, and then move onto the new; every puzzle has a link to some rules and history that should help you get started. The puzzles get harder throughout the week so starting with the Monday/Tuesday tagged puzzles is a good way to sample the site too.

This is the last week in my 10-week “introduction” phase as I showcase puzzles in the last remaining style for The Art of Puzzles (Fillomino) and also bring you another view of sudoku from my past. While I intended this week to be the end of the first contest period at Grandmaster Puzzles too, with the indicated number of entries each getting a signed copy of one of our books (some spots remain), I am considering leaving the contest open until even more submissions have come in.

As we reach the end of the beginning, maybe it is time to reminisce a bit. Grandmaster Puzzles was a dream born in 2007 at the 2nd World Sudoku Championship to have a domestic source of quality logic puzzles. US magazines then primarily used, as today, computer-generated puzzles and mostly seemed to know that sudoku exists but nothing else. I knew something better could be made, and I suspected there were puzzle authors out there hungry for a place to submit their creations instead of just putting them up for free on the web. While it has taken some time to get off the ground, as other puzzle writing tasks and real-life have crowded out starting a puzzle publishing company, the pieces are clearly coming into place now. Having sampled some of the really excellent puzzle submissions I’ve been getting for The Art of Puzzles recently, I know that this dream will soon be accomplished. All that remains is to grow the audience of puzzle lovers aware of how amazing hand-crafted puzzles can be!

– Dr. S